Prof. Alessandro Marconi Profile

Prof. Alessandro Marconi

Professor at INAF - Osservatorio Astrofisico di Arcetri

SPIE Involvement:

Author

Publications (26)

SPIE Journal Paper | 7 March 2023 Open Access

Open Access

UNet and MobileNet CNN-based model observers for CT protocol optimization: comparative performance evaluation by means of phantom CT images

Federico Valeri, Maurizio Bartolucci, Elena Cantoni, Roberto Carpi, Evaristo Cisbani, Ilaria Cupparo, Sandra Doria, Cesare Gori, Mauro Grigioni, Lorenzo Lasagni, Alessandro Marconi, Lorenzo Nicola Mazzoni, Vittorio Miele, Silvia Pradella, Guido Risaliti, Valentina Sanguineti, Diego Sona, Letizia Vannucchi, Adriana Taddeucci

JMI, Vol. 10, Issue S1, S11904, (March 2023) https://doi.org/10.1117/12.10.1117/1.JMI.10.S1.S11904

KEYWORDS: Computed tomography, Education and training, Molybdenum, Mathematical optimization, Image restoration, Infrared imaging, Image quality, Performance modeling, X-ray computed tomography, Medical image reconstruction

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Proceedings Article | 29 August 2022 Presentation + Paper

Presentation + Paper

ANDES, the high resolution spectrograph for the ELT: science case, baseline design and path to construction

A. Marconi, M. Abreu, V. Adibekyan, V. Alberti, S. Albrecht, J. Alcaniz, M. Aliverti, C. Allende Prieto, J. D. Alvarado Gómez, P. J. Amado, M. Amate, M. I. Andersen, E. Artigau, C. Baker, V. Baldini, A. Balestra, S. A. Barnes, F. Baron, S. C. C. Barros, S. M. Bauer, M. Beaulieu, O. Bellido-Tirado, B. Benneke, T. Bensby, E. A. Bergin, K. Biazzo, A. Bik, J. L. Birkby, N. Blind, I. Boisse, E. Bolmont, M. Bonaglia, X. Bonfils, F. Borsa, A. Brandeker, W. Brandner, C. H. Broeg, M. Brogi, D. Brousseau, A. Brucalassi, J. Brynnel, L. A. Buchhave, D. F. Buscher, A. Cabral, G. Calderone, R. Calvo-Ortega, B. L. Canto Martins, F. Cantalloube, L. Carbonaro, G. Chauvin, B. Chazelas, A.-L. Cheffot, Y. S. Cheng, A. Chiavassa, L. Christensen, R. Cirami, N. J. Cook, R. J. Cooke, I. Coretti, S. Covino, N. Cowan, G. Cresci, S. Cristiani, V. Cunha Parro, G. Cupani, V. D'Odorico, I. de Castro Leão, A. De Cia, J. R. De Medeiros, F. Debras, M. Debus, O. Demangeon, M. Dessauges-Zavadsky, P. Di Marcantonio, F. Dionies, R. Doyon, J. Dunn, D. Ehrenreich, J. P. Faria, C. Feruglio, M. Fisher, A. Fontana, M. Fumagalli, T. Fusco, J. Fynbo, O. Gabella, W. Gaessler, E. Gallo, X. Gao, L. Genolet, M. Genoni, P. Giacobbe, E. Giro, R. S. Gonçalves, O. Gonzalez, J. I. González Hernández, F. Gracia Témich, M. G. Haehnelt, C. Haniff, A. Hatzes, R. Helled, H.J. Hoeijmakers, P. Huke, S. Järvinen, A. Järvinen, A. Kaminski, A. Korn, D. Kouach, G. Kowzan, L. Kreidberg, M. Landoni, A. Lanotte, A. Lavail, J. Li, J. Liske, C. Lovis, S. Lucatello, D. Lunney, M. MacIntosh, N. Madhusudhan, L. Magrini, R. Maiolino, L. Malo, A. Man, T. Marquart, E. L. Marques, A. M. Martins, C. J. A. P. Martins, P. Maslowski, C. Mason, E. Mason, R. A. McCracken, P. Mergo, G. Micela, T. Mitchell, P. Mollière, M. Monteiro, D. Montgomery, C. Mordasini, J. Morin, A. Mucciarelli, M. T. Murphy, M. N'Diaye, B. Neichel, A. T. Niedzielski, E. Niemczura, L. Nortmann, P. Noterdaeme, N. Nunes, L. Oggioni, E. Oliva, H. Önel, L. Origlia, G. Östlin, E. Palle, P. Papaderos, G. Pariani, J. Peñate Castro, F. Pepe, L. Perreault Levasseur, P. Petit, L. Pino, J. Piqueras, A. Pollo, K. Poppenhaeger, A. Quirrenbach, E. Rauscher, R. Rebolo, E. M. A. Redaelli, S. Reffert, D. T. Reid, A. Reiners, P. Richter, M. Riva, S. Rivoire, C. Rodríguez-López, I. U. Roederer, D. Romano, S. Rousseau, J. Rowe, S. Salvadori, N. Santos, P. Santos Diaz, J. Sanz-Forcada, M. Sarajlic, J.-F. Sauvage, S. Schäfer, R. P. Schiavon, T. M. Schmidt, C. Selmi, S. Sivanandam, M. Sordet, R. Sordo, F. Sortino, D. Sosnowska, S. G. Sousa, E. Stempels, K. G. Strassmeier, A. Suárez Mascareño, A. Sulich, X. Sun, N.R. Tanvir, F. Tenegi-Sanginés, S. Thibault, S. J. Thompson, A. Tozzi, M. Turbet, P. Vallée, R. Varas, K. Venn, J.-P. Véran, A. Verma, M. Viel, G. Wade, C. Waring, M. Weber, J. Weder, B. Wehbe, J. Weingrill, M. Woche, M. Xompero, E. Zackrisson, A. Zanutta, M. R. Zapatero Osorio, M. Zechmeister, J. Zimara

Proceedings Volume 12184, 1218424 (2022) https://doi.org/10.1117/12.2628689

KEYWORDS: Physics, Spectrographs, Stars, Astronomy, Galactic astronomy, Astrophysics, Exoplanets, Planets, Spectral resolution, Absorption

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Proceedings Article | 25 August 2022 Presentation + Paper

Presentation + Paper

ANDES, the high resolution spectrograph for the ELT: project management and system engineering approaches for mastering its preliminary design phase

P. Di Marcantonio, A. Zanutta, A. Marconi, M. Abreu, V. Alberti, M. Aliverti, M. Andersen, V. Baldini, A. Balestra, F. Baron, J. Brynnel, A. Cabral, B. Chazelas, R. Cirami, I. Coretti, E. Gallo, E. Giro, W. Gaessler, O. Gonzalez, P. Huke, D. Kouach, I. Leão, D. Lunney, M. Macintosh, P. Masłowski, M. Monteiro, E. Oliva, L. Origlia, G. Pariani, E. Pinna, E. M. A. Redaelli, M. Riva, C. Selmi, F. Sortino, E. H. C. Stempels, B. Wehbe, M. Xompero, J. Zimara

Proceedings Volume 12187, 1218702 (2022) https://doi.org/10.1117/12.2628914

KEYWORDS: Spectrographs, Systems engineering, Astronomy, Physics, Exoplanets

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Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

ELT-HIRES, the high resolution spectrograph for the ELT: the Phase A study and the path to construction

A. Marconi , M. Abreu, V. Adibekyan, M. Aliverti, C. Allende Prieto, P. Amado, M. Amate, E. Artigau, S. Augusto, S. Barros, S. Becerril, B. Benneke, E. Bergin, P. Berio, N. Bezawada, I. Boisse, X. Bonfils, F. Bouchy, C. Broeg, A. Cabral, R. Calvo-Ortega, B. Canto Martins, B. Chazelas, A. Chiavassa, L. Christensen, R. Cirami, I. Coretti, S. Covino, G. Cresci, S. Cristiani, V. Cunha Parro, G. Cupani, V. D'Odorico, I. de Castro Leão, J. de Medeiros, M. de Souza, P. Di Marcantonio, I. Di Varano, R. Doyon, H. Drass, P. Figueira, A. Fragoso, J. Fynbo, E. Gallo, M. Genoni, J. González Hernández, R. Gratton, M. Haehnelt, C. Hansen, J. Hlavacek-Larrondo, I. Hughes, P. Huke, A. Humphrey, H. Kjeldsen, A. Korn, D. Kouach, M. Landoni, J. Liske, C. Lovis, D. Lunney, R. Maiolino, L. Malo, T. Marquart, C. J. A. P. Martins, P. Maslowski, E. Mason, G. Micela, P. Molaro, J. Monnier, M. Monteiro, C. Mordasini, T. Morris, A. Mucciarelli, G. Murray, A. Niedzielski, E. Niemczura, B. Nisini, N. Nunes, E. Oliva, L. Origlia, E. Pallé, G. Pariani, P. Parr-Burman, L. Pasquini, J. Peñate, F. Pepe, G. Pietrzynski, E. Pinna, N. Piskunov, A. Pollo, J. Rasilla, R. Rebolo, P. Rees, A. Reiners, M. Riva, D. Romano, S. Rousseau, N. Sanna, M. Sarajlic, T.-C. Shen, F. Sortino, D. Sosnowska, S. Sousa, E. Stempels, K. Strassmeier, F. Tenegi, A. Tozzi, S. Udry, L. Valenziano, L. Vanzi, M. Weber, M. Woche, M. Xompero, E. Zackrisson, M. R. Zapatero Osorio

Proceedings Volume 11447, 1144726 (2020) https://doi.org/10.1117/12.2560489

KEYWORDS: Spectrographs, Large telescopes, Telescopes, Exoplanets, Atmospheric sciences, Atmospheric sensing, Spectral resolution

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Proceedings Article | 18 July 2018 Paper

Paper

ELT-HIRES the high resolution spectrograph for the ELT: implementing exoplanet atmosphere reflection detection with a SCAO module

Marco Xompero, Christophe Giordano, Marco Bonaglia, Gianluca Di Rico, Guido Agapito, Simone Esposito, Andrea Tozzi, Nicoletta Sanna, Ernesto Oliva, Alessandro Marconi

Proceedings Volume 10703, 1070341 (2018) https://doi.org/10.1117/12.2309951

KEYWORDS: Point spread functions, Cameras, Mirrors, Telescopes, Adaptive optics, Exoplanets, Atmospheric optics, Atmospheric sensing, Device simulation, Modulation

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Proceedings Article | 16 July 2018 Paper

Paper

ELT-HIRES, the High Resolution Spectrograph for the ELT: the design of the Front End

Alexandre Cabral, Matteo Aliverti, João Coelho, Manuel Abreu, Marco Riva, Alessandro Marconi, Luca Valenziano, Ernesto Oliva

Proceedings Volume 10702, 107029T (2018) https://doi.org/10.1117/12.2313554

KEYWORDS: Spectrographs, Calibration, Polarimetry, Telescopes, Image quality, Large telescopes

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Proceedings Article | 12 July 2018 Paper

Paper

ELT-HIRES the high resolution spectrograph for the ELT: application of E2E + ETC for instrument characterisation, from efficiency to accuracy in radial velocity measurements

M. Genoni, M. Landoni, P. Huke, N. Sanna, E. Mason, A. Marconi, L. Origlia, M. Riva, P. Di Marcantonio

Proceedings Volume 10702, 107029I (2018) https://doi.org/10.1117/12.2313360

KEYWORDS: Calibration, Signal to noise ratio, Spectrographs, Optical fibers, Spectral calibration, Sensors, Velocity measurements, Telescopes, Diffraction, Precision measurement

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Proceedings Article | 10 July 2018 Paper

Paper

ELT -HIRES, the high resolution spectrograph for the ELT; end-to-end simulator: design approach and results.

M. Genoni, M. Landoni, M. Riva, G. Pariani, E. Mason, P. Di Marcantonio, O. Gonzalez, P. Huke, H. Korhonen, M. Xompero, Christophe Giordano, I. Di Varano, Gianluca Li Causi, E. Oliva, Thomas Marquart, A. Marconi

Proceedings Volume 10705, 1070514 (2018) https://doi.org/10.1117/12.2312105

KEYWORDS: Device simulation, Spectrographs, Telescopes, Point spread functions, Calibration, Computer architecture, Computer simulations, Sensors, Instrument modeling, Adaptive optics

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Proceedings Article | 10 July 2018 Presentation + Paper

Presentation + Paper

ELT-HIRES the high resolution spectrograph for the ELT: phase-A design of its polarimetric unit

I. Di Varano, M. Woche, K. Strassmeier, I. Ilyin, M. Weber, S. Yuan, S. Covino, P. Di Marcantonio, M. Landoni, M. Genoni, M. Riva, A. Marconi

Proceedings Volume 10706, 107061Y (2018) https://doi.org/10.1117/12.2312115

KEYWORDS: Polarimetry, Polarization, Calibration, Prisms, Earthquakes, Wave plates, Telescopes, Spectrographs

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Proceedings Article | 10 July 2018 Paper

Paper

ELT-HIRES the high resolution spectrograph for the ELT: fiber link

Ana Fragoso-López, José Luis Rasilla, Graham Murray, Ernesto Oliva, Robert Harris, Roger Haynes, Marco Riva, Alessandro Marconi

Proceedings Volume 10702, 107028S (2018) https://doi.org/10.1117/12.2311639

KEYWORDS: Spectrographs, Interfaces, Polarimetry, Connectors, Spectroscopy, Calibration, Spectrometers, Large telescopes, Optical fibers, Manufacturing

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Proceedings Article | 8 July 2018 Paper

Paper

ELT-HIRES the high resolution instrument for the ELT: optical design and instrument architecture

E. Oliva, A. Tozzi, D. Ferruzzi, M. Riva, M. Genoni, A. Marconi, R. Maiolino, L. Origlia

Proceedings Volume 10702, 107028O (2018) https://doi.org/10.1117/12.2309923

KEYWORDS: Spectrometers, Cameras, Spectrographs, Optical fibers, Collimators, Mirrors, Optical design, Spectral resolution, Telescopes

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Proceedings Article | 6 July 2018 Paper

Paper

ELT high resolution spectrograph: phase-A software architecture study

P. Di Marcantonio, R. Cirami, G. Cupani, I. Di Varano, H. Drass, P. Figueira, M. A. F. de Souza , M. Genoni, O. Gonzalez, M. Landoni, G. Li Causi, T. Marquart, E. Mason, M. Monteiro, V. C. Parro, S. Augusto, S. Rousseau, N. Sanna, T. Shen, D. Sosnowska, S. Sousa, M. Xompero, I. Boisse, A. Marconi

Proceedings Volume 10707, 107071T (2018) https://doi.org/10.1117/12.2311296

KEYWORDS: Spectrographs, Cameras, Control systems, Calibration, Computer architecture, Device simulation, Sensors, Polarimetry, Telescopes, Data acquisition

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Proceedings Article | 6 July 2018 Presentation + Paper

Presentation + Paper

ELT-HIRES, the high resolution spectrograph for the ELT: results from the Phase A study

A. Marconi, C. Allende Prieto, P. Amado, M. Amate, S. Augusto, S. Becerril, N. Bezawada, I. Boisse, F. Bouchy, A. Cabral, B. Chazelas, R. Cirami, I. Coretti, S. Cristiani, G. Cupani, I. de Castro Leão, J. R. de Medeiros, M. A. F. de Souza, P. Di Marcantonio, I. Di Varano, V. D'Odorico, H. Drass, P. Figueira, A. B. Fragoso, J. P. U. Fynbo, M. Genoni, J. I. González Hernández, M. Haehnelt, I. Hughes, P. Huke, H. Kjeldsen, A. Korn, M. Landoni, J. Liske, C. Lovis, R. Maiolino , T. Marquart, C. J. A. P. Martins, E. Mason, M. Monteiro, T. Morris, G. Murray, A. Niedzielski, E. Oliva, L. Origlia, E. Pallé, P. Parr-Burman, V. C. Parro, F. Pepe, N. Piskunov, J. L. Rasilla, P. Rees, R. Rebolo, M. Riva, S. Rousseau, N. Sanna, N. Santos, T.-C. Shen, F. Sortino, D. Sosnowska, S. Sousa, E. Stempels, K. Strassmeier, F. Tenegi, A. Tozzi, S. Udry, L. Valenziano, L. Vanzi, M. Weber, M. Woche, M. Xompero, E. Zackrisson

Proceedings Volume 10702, 107021Y (2018) https://doi.org/10.1117/12.2311664

KEYWORDS: Spectrographs, Stars, Physics, Galactic astronomy, Astronomy, Exoplanets, Spectral resolution, Calibration, Absorption, Spectroscopy

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Proceedings Article | 9 August 2016 Paper

Paper

EELT-HIRES the high-resolution spectrograph for the E-ELT

A. Marconi, P. Di Marcantonio, V. D'Odorico, S. Cristiani, R. Maiolino, E. Oliva, L. Origlia, M. Riva, L. Valenziano, F. M. Zerbi, M. Abreu, V. Adibekyan, C. Allende Prieto, P. J. Amado, W. Benz, I. Boisse, X. Bonfils, F. Bouchy, L. Buchhave, D. Buscher, A. Cabral, B. Canto Martins, A. Chiavassa, J. Coelho, L. B. Christensen, E. Delgado-Mena, J. R. de Medeiros, I. Di Varano, P. Figueira, M. Fisher, J. P. Fynbo, A. C. Glasse, M. Haehnelt, C. Haniff, C. J. Hansen, A. Hatzes, P. Huke, A. Korn, I. C. Leão, J. Liske, C. Lovis, P. Maslowski, I. Matute, R. McCracken, C. J. A. Martins, M. J. P. F. Monteiro, S. Morris, T. Morris, H. Nicklas, A. Niedzielski, N. Nunes, E. Palle, P. Parr-Burman, V. Parro, I. Parry, F. Pepe, N. Piskunov, Didier Queloz, A. Quirrenbach, R. Rebolo Lopez, A. Reiners, D. Reid, N. Santos, W. Seifert, S. Sousa, H. Stempels, K. Strassmeier, X. Sun, S. Udry, L. Vanzi, M. Vestergaard, M. Weber, E. Zackrisson

Proceedings Volume 9908, 990823 (2016) https://doi.org/10.1117/12.2231653

KEYWORDS: Physics, Stars, Spectrographs, Exoplanets, Planets, Galactic astronomy, Spectral resolution, Astronomy, Atmospheric sensing, Polarimetry

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Proceedings Article | 26 July 2016 Paper

Paper

EELT-HIRES the high resolution spectrograph for the E-ELT: software and hardware solutions for its control

P. Di Marcantonio, V. Baldini, G. Calderone, R. Cirami, I. Coretti, G. Cupani, V. D'Odorico, S. Cristiani, A. Marconi

Proceedings Volume 9913, 99133R (2016) https://doi.org/10.1117/12.2231585

KEYWORDS: Spectrographs, Commercial off the shelf technology, Photonic integrated circuits, Computer architecture, Telescopes, Control systems, Sensors, Standards development, Cameras, Telecommunications

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Proceedings Article | 15 July 2016 Paper

Paper

E-ELT HIRES the high resolution spectrograph for the E-ELT: integrated data flow system

Guido Cupani, Stefano Cristiani, Valentina D'Odorico, Emanuele Pomante, Giorgio Calderone, Paolo Di Marcantonio, Alessandro Marconi

Proceedings Volume 9910, 99102F (2016) https://doi.org/10.1117/12.2231575

KEYWORDS: Spectrographs, Data archive systems, Evolutionary algorithms, Telescopes, Humidity, Space telescopes, Databases, Observatories, Sun, Astronomy

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Proceedings Article | 6 August 2014 Paper

Paper

HIRES: the high resolution spectrograph for the E-ELT

F. Zerbi, F. Bouchy, J. Fynbo, R. Maiolino, N. Piskunov, R. Rebolo Lopez, N. Santos, K. Strassmeier, S. Udry, L. Vanzi, M. Riva, A. Basden, I. Boisse, X. Bonfils, D. Buscher, A. Cabral, P. Dimarcantonio, I. Di Varano, D. Henry, M. Monteiro, T. Morris, G. Murray, Ernesto Oliva, I. Parry, F. Pepe, A. Quirrenbach, J. Rasilla, P. Rees, E. Stempels, L. Valenziano, M. Wells, F. Wildi, L. Origlia, C. Allende Prieto, A. Chiavassa, S. Cristiani, P. Figueira, B. Gustafsson, A. Hatzes, M. Haehnelt, K. Heng, G. Israelian, O. Kochukhov, C. Lovis, A. Marconi, C. J. A. P. Martins, P. Noterdaeme, P. Petitjean, T. Puzia, Didier Queloz, A. Reiners, M. Zoccali

Proceedings Volume 9147, 914723 (2014) https://doi.org/10.1117/12.2055329

KEYWORDS: Spectrographs, Spectral resolution, Stars, Telescopes, Spectroscopy, Calibration, Collimators, Cameras, Galactic astronomy, Sensors

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Proceedings Article | 12 September 2012 Paper

Paper

VLTI/AMBER differential interferometry of the broad-line region of the quasar 3C273

Romain Petrov, Florentin Millour, Stéphane Lagarde, Martin Vannier, Suvendu Rakshit, Alessandro Marconi, Gerd weigelt

Proceedings Volume 8445, 84450W (2012) https://doi.org/10.1117/12.926595

KEYWORDS: Visibility, Calibration, Interferometry, Data processing, Error analysis, Colorimetry, Fourier transforms, Spectral resolution, K band, Sensors

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Proceedings Article | 12 May 2012 Paper

Paper

Opto-electrical characterization of erbium-doped slot waveguides

Andrea Tengattini, Davide Gandolfi, Alessandro Marconi, Oleksiy Anopchenko, Nikola Prtljaga, Joan Manel Ramirez, Federico Ferrarese Lupi, Yonder Berencen, Daniel Navarro Urrios, Blas Garrido, Jean-Marc Fedeli, Pierrette Rivallin, Kavita Surana, Lorenzo Pavesi

Proceedings Volume 8431, 843118 (2012) https://doi.org/10.1117/12.922695

KEYWORDS: Waveguides, Erbium, Silicon, Electroluminescence, Absorption, Signal attenuation, Ions, Light wave propagation, Wave propagation, Optical amplifiers

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Proceedings Article | 24 August 2010 Paper

Paper

Silicon solar cells with nano-crystalline silicon down shifter: experiment and modeling

Yoann Jestin, Georg Pucker, Mher Ghulinyan, Lorenza Ferrario, Pierluigi Bellutti, Antonio Picciotto, Amos Collini, Alessandro Marconi, Aleksei Anopchenko, Zhizhong Yuan, Lorenzo Pavesi

Proceedings Volume 7772, 77720B (2010) https://doi.org/10.1117/12.861978

KEYWORDS: Solar cells, Silicon, Luminescence, Absorption, Photons, Internal quantum efficiency, Silicon solar cells, Solar energy, Nanocrystals, Dielectrics

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Proceedings Article | 28 July 2008 Paper

Paper

Science case for 1 mas spectro-imagining in the near-infrared

Paulo Garcia, Jean-Philippe Berger, Alessandro Marconi, Alexander Krivov, Andrea Chiavassa, Bernard Aringer, Brunella Nisini, Denis Defrére, Dimitri Mawet, Dieter Schertl, Eric Tatuli, Eric Thiébaut, Fabien Baron, Fabien Malbet, Gaspard Duchéne, Gerd Weigelt, Gilles Duvert, Gilles Henri, Hubert Klahr, Jean Surdej, Jean-Charles Augereau, Jean-François Claeskens, John Young, Josef Hron, Karine Perraut, Karl-Heinz Hofmann, Leonardo Testi, Margarida Cunha, Mercedes Filho, Michaël De Becker, Olivier Absil, Olivier Chesneau, Pierre Collette, Pierre-Olivier Petrucci, Ralph Neuhaeuser, Romano Corradi, Sónia Antón, Sebastian Wolf, Sebastian Hoenig, Stephanie Renard, Thierry Forveille, Thomas Beckert, Thomas Lebzelter, Tim Harries, Virginie Borkowski, Xavier Bonfils

Proceedings Volume 7013, 70134N (2008) https://doi.org/10.1117/12.789216

KEYWORDS: Stars, Telescopes, Spatial resolution, Planets, Galactic astronomy, Adaptive optics, Spectral resolution, Visibility, Interferometry, High dynamic range imaging

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We present the work developed within the science team of the Very Large Telescope Interferometer Spectro-Imager (VSI) during the Phase A studies. VSI aims at delivering ~ 1 milliarcsecond resolution data cubes in the near-infrared, with several spectral resolutions up to 12 000, by combining up to 8 VLTI telescopes. In the design of an instrument, the science case plays a central role by supporting the instrument construction decision, defining the top-level requirements and balancing design options. The overall science philosophy of VSI was that of a general user instrument serving a broad community. The science team addressed themes which included several areas of astrophysics and illustrated specific modes of operation of the instrument: a) YSO disks and winds; b) Multiplicity of young stars; c) Exoplanets; d) Debris disks; e) Stellar surface imaging; f) The environments of evolved stars; g) AGN tori; h) AGN's Broad Line Region; i) Supermassive black-holes; and j) Microlensing. The main conclusions can be summarized as follows: a) The accessible targets and related science are extremely sensitive to the instrument limiting magnitude; the instrument should be optimized for sensitivity and have its own fringe tracker. b) Most of the science cases are readily achievable with on-axis fringe tracking, off-axis fringe tracking enabling extra science. c) In most targets (YSOs, evolved stars and AGNs), the interpretation and analysis of circumstellar/nuclear dust morphology requires direct access to the gas via spectral resolved studies of emission lines, requiring at least a spectral resolution of 2 500. d) To routinely deliver images at the required sensitivity, the number of telescopes in determinant, with 6 telescopes being favored. e) The factorial increase in the number of closure phases and visibilities, gained in a single observation, makes massive surveys of parameters and related science for the first time possible. f) High dynamic range imaging and very high dynamic range differential closure phase are possible allowing the study of debris disks and characterization of pegasides. g) Spectro-imaging in the near-infrared is highly complementary to ALMA, adaptive optics and interferometric imaging in the thermal infrared.

Proceedings Article | 28 July 2008 Paper

Paper

VSI: the VLTI spectro-imager

F. Malbet, D. Buscher, G. Weigelt, P. Garcia, M. Gai, D. Lorenzetti, J. Surdej, J. Hron, R. Neuhäuser, P. Kern, L. Jocou, J.-P. Berger, O. Absil, U. Beckmann, L. Corcione, G. Duvert, M. Filho, P. Labeye, E. Le Coarer, G. Li Causi, J. Lima, K. Perraut, E. Tatulli, E. Thiébaut, J. Young, G. Zins, A. Amorim, B. Aringer, T. Beckert, M. Benisty, X. Bonfils, A. Cabral, A. Chelli, O. Chesneau, A. Chiavassa, R. Corradi, M. De Becker, A. Delboulbé, G. Duchêne, T. Forveille, C. Haniff, E. Herwats, K.-H. Hofmann, J.-B. Le Bouquin, S. Ligori, D. Loreggia, A. Marconi, A. Moitinho, B. Nisini, P.-O. Petrucci, J. Rebordao, R. Speziali, L. Testi, F. Vitali

Proceedings Volume 7013, 701329 (2008) https://doi.org/10.1117/12.789710

KEYWORDS: Telescopes, Stars, Spectral resolution, Spatial resolution, Interferometry, Integrated optics, Space telescopes, Visibility, Image restoration, Signal to noise ratio

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The VLTI Spectro Imager (VSI) was proposed as a second-generation instrument of the Very Large Telescope Interferometer providing the ESO community with spectrally-resolved, near-infrared images at angular resolutions down to 1.1 milliarcsecond and spectral resolutions up to R = 12000. Targets as faint as K = 13 will be imaged without requiring a brighter nearby reference object; fainter targets can be accessed if a suitable reference is available. The unique combination of high-dynamic-range imaging at high angular resolution and high spectral resolution enables a scientific program which serves a broad user community and at the same time provides the opportunity for breakthroughs in many areas of astrophysics. The high level specifications of the instrument are derived from a detailed science case based on the capability to obtain, for the first time, milliarcsecond-resolution images of a wide range of targets including: probing the initial conditions for planet formation in the AU-scale environments of young stars; imaging convective cells and other phenomena on the surfaces of stars; mapping the chemical and physical environments of evolved stars, stellar remnants, and stellar winds; and disentangling the central regions of active galactic nuclei and supermassive black holes. VSI will provide these new capabilities using technologies which have been extensively tested in the past and VSI requires little in terms of new infrastructure on the VLTI. At the same time, VSI will be able to make maximum use of new infrastructure as it becomes available; for example, by combining 4, 6 and eventually 8 telescopes, enabling rapid imaging through the measurement of up to 28 visibilities in every wavelength channel within a few minutes. The current studies are focused on a 4-telescope version with an upgrade to a 6-telescope one. The instrument contains its own fringe tracker and tip-tilt control in order to reduce the constraints on the VLTI infrastructure and maximize the scientific return.

Proceedings Article | 28 July 2008 Paper

Paper

VLTI-AMBER observations of Eta Carinae with the FINITO fringe tracker and spectral resolution 12000

Gerd Weigelt, Olivier Chesneau, Thomas Driebe, Renaud Foy, Didier Fraix-Burnet, Jose Groh, Karl-Heinz Hofmann, Stefan Kraus, Fabien Malbet, Alessandro Marconi, Philippe Mathias, Florentin Millour, Jean-Louis Monin, Romain Petrov, Frederik Rantakyrö, Andrea Richichi, Dieter Schertl, Markus Schöller, Philippe Stee, Leonardo Testi, Markus Wittkowski

Proceedings Volume 7013, 701303 (2008) https://doi.org/10.1117/12.796204

KEYWORDS: Visibility, Bromine, Spectral resolution, Phase measurement, Spectroscopy, Interferometry, Stars, Speckle, Telescopes, Binary data

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Proceedings Article | 28 June 2006 Paper

Paper

VLTI-AMBER observations of Eta Carinae with high spatial resolution and spectral resolutions of 1,500 and 10,000

Gerd Weigelt, Romain Petrov, Olivier Chesneau, Kris Davidson, Armando Domiciano de Souza, Thomas Driebe, Renaud Foy, Didier Fraix-Burnet, Ted Gull, John Hillier, Karl-Heinz Hofmann, Stefan Kraus, Fabien Malbet, Alessandro Marconi, Philippe Mathias, Jean-Louis Monin, Florentin Millour, Keiichi Ohnaka, Frederik Rantakyrö, Andrea Richichi, Dieter Schertl, Markus Schöller, Philippe Stee, Leonardo Testi, Markus Wittkowski

Proceedings Volume 6268, 62682S (2006) https://doi.org/10.1117/12.671582

KEYWORDS: Visibility, Bromine, Spectral resolution, K band, Stars, Spatial resolution, Phase measurement, Observatories, Interferometry, Near infrared

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Proceedings Article | 20 October 2004 Paper

Paper

Science program of the AMBER consortium

Fabien Malbet, Thomas Driebe, Renaud Foy, Didier Fraix-Burnet, Philippe Mathias, Alessandro Marconi, Jean-Louis Monin, Romain Petrov, Philippe Stee, Leonardo Testi, Gerd Weigelt

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.550667

KEYWORDS: Stars, Telescopes, Beryllium, Interferometry, Spectral resolution, K band, Phase measurement, Interferometers, Spatial resolution, Astatine

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Proceedings Article | 21 February 2003 Paper

Paper

Astrophysical potential of the AMBER/VLTI instrument

Fabien Malbet, Thomas Bloecker, Renaud Foy, Didier Fraix-Burnet, Philippe Mathias, Alesssandro Marconi, Jean-Louis Monin, Romain Petrov, Philippe Stee, Leonardo Testi, Gerd Weigelt

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.458907

KEYWORDS: Stars, Spectral resolution, Visibility, Interferometers, Telescopes, Phase measurement, Planets, Jupiter, Large telescopes, Spatial frequencies

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Showing 5 of 26 publications

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